Chesapeake Bay - Halfheads Folly UV IndexUnited StatesMDSt Marys CountyChesapeake Bay - Halfheads Folly1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAChesapeake Bay - Halfheads Folly UV forecast issued yesterday at 3:17 pm. Next forecast at approx. 3:17 pm.Get WillyWeather+ to remove ads